Pendulum



l (No Model.)

O. C. RETSLOIP.

PBND'ULUM.

No. 272,978. Patented Feb.27,1888.

wrrmzsss INvEN'ru ATTORNEYS'.

UNITED STATES PATENT OFFICE.

OTTO O. BETSLOFF, OF WINNEBAGO CITY, MINNESOTA.

PENDULUM.

SPECIFICATION forming part of Letters Patent No. 272,978, dated February 27, 1883.

Application filed April 28, 1882.

To all whom it may concern:

Be it known that 1', OTTO C. RETsLoEE, of Winnebago City, in the county of Faribault and State ot' Minnesota, have invented a. new and useful Improvement in Pendulums, of which the following` is a full, clear, and exact description.

'Ihe object of my invention is to provide for the accurate regulation of pendulunrclocks by adjustment ot' the length of the rod; and to that end my invention consists in a pendulumbob fitted for rotation by its adjustiiignut, and provided with a pointer to indicate the extent of the movement, as hereinatter described and claimed Reference is to be had to the accompanying drawings, forming part ot' this specification, in which similar letters ofrefercnce indicate corresponding parts in both the tigures.

Figure l is a front elevation ot' my improved pendulum. Fig. 2 is a rear elevation, partly sectional.

A is the pendulum-rod, carrying a bob, B, which slides freely on the rod, and is adjustable by the nut ct at the lower end ofthe rod.

Upon a stud at the middle of the bob is a disk or wheel, O, formed with cogs atits edge, which engage a pinion, b, fixed on the nut a. The face of the Wheel O is marked with divisions arranged at regular intervals, and numbered in regular order.

Upon the bob, above the dial, is a fixed pointer, d, which indicates, in connection with the marks upon the dial, the extent of its rotation.

The bob is adjusted by turning the nut a to the right or left, as usual, and thereby raising and lowering the bob upon the rod. By the engagement of the pinion with the teeth of the dial, the dial is caused to rotate at the same time that the bob is raised and lowered, and the pointer d thus indicates both the rotation (No model.)

ofthe dial and the extent of movement of the bob lengthwise of the rod.

The marks upon the dial will be arranged at proper intervals, so that the distance between them shall indicate a variation in the movement ofthe clock of a definite length of time in twenty-four hours, from a quarter of a minute upward. By this arrangement, when it is desired to have the clock gain or lose a certain length of time, the bob will be adjusted to correspond, and the pointer and revolving dial will serve as the guide by which this adjustment can be accurately made.

This device is simple, inexpensive, and reliable, and by its use clocks can be accurately regulated, instead of their regulation being left to guess-work, as is usually the case.

The dial will usually be arranged to effect a dierence of thirty minutes in twenty-four ,hours and the rod iitted to allow four revolutions oi the dial.

I am aware that pendulums have been patented having dials for registering the number of turns of the screw-nut used to adjust the saine fast or slow, and I do not claim this, broadly, as my invention; but

Vh-at I claim, and wish to secure by Letters Patent, is-

In pendulums, the combination, with the bob B, screw-rod A, and nut a, of the spaced and tigured dial-plate C, pivoted to the bob B, to revolve in a vertical plane by the action of the pinion-wheel b, of the nut a upon beveled gear-teeth on its periphery, and a hand or pointer, cl, secured to the bob B, and pointing to the indices of the dial, as shown and described.

OTTO O. RETSLOFF.

r Witnesses:

C. H. PATTEN, G. H. Fox. 

